Specialized · Aethos

Aethos Pro - Shimano Ultegra Di2

2025

$4,899.99

Manufacturer price · US market. Not a local price.

Specialized Aethos Pro - Shimano Ultegra Di2
S-Works Short & ShallowHandlebar
Body Geometry Power Pro with MirrorSaddle
Aethos FACT 10r CarbonFrame
FACT CarbonFork
Shimano Ultegra R8170 · 160 mm / 140 mmBrakes
Shimano Ultegra Di2 R8150 · 12 speedsDrivetrain
S-works Turbo 2BR · 28 mmTyres

Tap a number to see the part.

S-Works Short & Shallow

Handlebar

The handlebar and stem are where your hands steer the bike. Their width and length set how upright or stretched out you sit.

Body Geometry Power Pro with Mirror

Saddle

The saddle and seatpost carry your weight. The height of the seatpost sets your pedalling position.

Aethos FACT 10r Carbon

Frame

The frame is the bike's backbone: every other part is fixed to it. Its material and shape decide its weight and how it feels to ride.

FACT Carbon

Fork

The fork holds the front wheel. A suspension fork absorbs bumps at the front; its travel is how far it can compress.

Shimano Ultegra R8170 · 160 mm / 140 mm

Brakes

Brakes slow the bike. Disc brakes squeeze a rotor fixed to the wheel hub; rim brakes squeeze the wheel rim itself.

Shimano Ultegra Di2 R8150 · 12 speeds

Drivetrain

The drivetrain turns your pedalling into motion: the cranks, the chain, the cassette and the derailleur that changes gear.

S-works Turbo 2BR · 28 mm

Tyres

Tyres are the bike's only contact with the ground. Their width and tread decide grip, comfort and rolling speed.

© Specialized Bicycle Components

Equipment

Partial coverageChecked: August 25, 2026Manufacturer page
Rear derailleur brand
Shimano
Source text
  • “Shimano Ultegra Di2 R8150, 12-speed” — Rear Derailleur
Front brake brand
Shimano
Source text
  • “Shimano Ultegra R8170, hydraulic disc, 160mm rotor” — Front Brake
Front brake type
Hydraulic disc
Source text
  • “Shimano Ultegra R8170, hydraulic disc, 160mm rotor” — Front Brake
Front brake rotor diameter
160 mm
Source text
  • “Shimano Ultegra R8170, hydraulic disc, 160mm rotor” — Front Brake
Rear brake brand
Shimano
Source text
  • “Shimano Ultegra R8170, hydraulic disc, 140mm rotor” — Rear Brake
Rear brake type
Hydraulic disc
Source text
  • “Shimano Ultegra R8170, hydraulic disc, 140mm rotor” — Rear Brake
Rear brake rotor diameter
140 mm
Source text
  • “Shimano Ultegra R8170, hydraulic disc, 140mm rotor” — Rear Brake
Front wheel brand
Roval
Source text
  • “Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready” — Front Wheel
Rear wheel brand
Roval
Source text
  • “Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready” — Rear Wheel
Front tyre width
28 mm
Source text
  • “S-works Turbo 2BR, 700x28mm” — Front Tire
Rear tyre width
28 mm
Source text
  • “S-works Turbo 2BR, 700x28mm” — Rear Tire
Frame material
Carbon
Source text
  • “Aethos FACT 10r Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc” — Frame
Cassette speeds
12
Source text
  • “Shimano Ultegra, 12-speed, 11-30t” — Cassette
Cassette teeth
11/30
Source text
  • “Shimano Ultegra, 12-speed, 11-30t” — Cassette
Chainring teeth
52/36
Source text
  • “52/36T” — Chainrings
Bike weight
6.78 kgSize: ⁨56⁩
Source text
  • “6.78kg (14 lb, 15.2 oz)” — Weight
  • “56” — Weight Size

Components

Frame
Aethos FACT 10r Carbon, Rider First Engineered™, Threaded BB, 12x142mm thru-axle, flat-mount disc
Crank length49
165mm
Crank length52
170mm
Crank length54
172.5mm
Crank length56
172.5mm
Crank length58
175mm
Crank length61
175mm
Fork
FACT Carbon, 12x100mm thru-axle, flat-mount disc
Handlebar width49
380mm
Handlebar width52
400mm
Handlebar width54
420mm
Handlebar width56
420mm
Handlebar width58
440mm
Handlebar width61
440mm
Front brake
Shimano Ultegra R8170, hydraulic disc, 160mm rotor
Stem length49
80mm
Stem length52
90mm
Stem length54
100mm
Stem length56
100mm
Stem length58
110mm
Stem length61
110mm
Rear brake
Shimano Ultegra R8170, hydraulic disc, 140mm rotor
Saddle width49
155mm
Saddle width52
155mm
Saddle width54
143mm
Saddle width56
143mm
Saddle width58
143mm
Saddle width61
143mm
Shift levers
Shimano Ultegra Di2 R8170, hydraulic disc
Seatpost length49
300mm
Seatpost length52
300mm
Seatpost length54
360mm
Seatpost length56
360mm
Seatpost length58
360mm
Seatpost length61
360mm
Front derailleur
Shimano Ultegra Di2 R8150, braze-on
Rear derailleur
Shimano Ultegra Di2 R8150, 12-speed
Cassette
Shimano Ultegra, 12-speed, 11-30t
Chain
Shimano M8100, 12-speed w/ quick link
Crankset
Shimano Ultegra R8100 with 4iiiis Precision 3+ Power Meter
Chainrings
52/36T
Bottom bracket
Shimano Threaded BSA BB
Front tyre
S-works Turbo 2BR, 700x28mm
Front wheel
Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready
Rear tyre
S-works Turbo 2BR, 700x28mm
Rear wheel
Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, Win Tunnel Engineered, DT for Roval 350 hub, DT Swiss Aerolite spokes, Tubeless Ready
Inner tubes
700x20-28, 48mm Presta Valve
Stem
Specialized Pro SL, alloy, 4-bolt
Handlebar
S-Works Short & Shallow, 125mm Drop, 75mm Reach w/Di2 Hole
Bar tape
Supacaz Super Sticky Kush
Saddle
Body Geometry Power Pro with Mirror, hollow titanium rails
Seatpost
Roval Alpinist Carbon Seatpost
Seatpost clamp
Specialized Alloy, 30mm
Product ID
221544
Weight
6.78kg (14 lb, 15.2 oz)
Size used for weighing
56

Geometry

Frames drawn: Specialized Aethos Pro - Shimano Ultegra Di2 · 49.
Specialized Aethos Pro - Shimano Ultegra Di2 · 49
Measure495254565861
Wheels700c700c700c700c700c700c
514 mm527 mm544 mm565 mm591 mm612 mm
375 mm380 mm384 mm395 mm402 mm408 mm
109 mm120 mm137 mm157 mm184 mm204 mm
71.8°72.5°73°73.5°73.5°74°
266 mm266 mm268 mm268 mm268 mm268 mm
74 mm74 mm72 mm72 mm72 mm72 mm
63 mm58 mm58 mm55 mm55 mm52 mm
Fork Length (full)369 mm369 mm369 mm369 mm369 mm369 mm
47 mm47 mm44 mm44 mm44 mm44 mm
574 mm577 mm579 mm591 mm606 mm613 mm
410 mm410 mm410 mm410 mm410 mm410 mm
973 mm975 mm978 mm991 mm1,005 mm1,012 mm
508 mm531 mm540 mm562 mm577 mm595 mm
705 mm728 mm748 mm769 mm796 mm824 mm
431 mm462 mm481 mm504 mm532 mm567 mm
75.5°74°74°73.5°73.5°73°

Similar bikes

Similar bicycles: same category and type, comparable US MSRP

How we choose
  • Same category and electric or non-electric type
  • US MSRP ratio no greater than 1.3
  • Other families, ordered by price and stack/reach proximity

Manufacturer suggested retail prices are for the US market in USD. They are not local retail prices.

Show all (10)